Javascript 是否可以将css模糊效果移除到完整div的特定区域

我有一个具有模糊效果的背景图像的div

html

---

当我将鼠标悬停在背景图像上时，我想消除鼠标指针所在位置的模糊效果。是否可以从jquery中执行此操作。这就是我想要实现的例子

我用jQuery解决方案创建了一个小提琴。它模糊了图像悬停的部分。希望它能帮助：

jQuery

$('.pic').mousemove(function(event){
    event.preventDefault();
    var upX=event.clientX;
    var upY=event.clientY;
    $('#blurr').css({'display':'block','top':''+(upY-15)+'px','left':''+(upX-15)+'px'});
});

/**Give equal width and height as <img> to .blurPic**/
var hgt = $('.blurPic').width($('#container img').width());
$('.blurPic').height($('#container img').height());
/*****************************************************/

/*******Get shadow values*****/
var result = $('.blurPic').css('boxShadow').match(/(-?\d+px)|(rgb\(.+\))/g)
var color = result[0],
    y = result[1],
    x = result[2],
    blur = result[3];
/******************************/

/**Change box-shadow on mousemove over image**/
var blurStartW = hgt.width()/2;
var blurStartH = hgt.height()/2;
$('.blurPic').mousemove(function(event){
    event.preventDefault();
    var scrollLeftPos = $(window).scrollLeft(),
    scrollTopPos = $(window).scrollTop(),
    offsetLft = hgt.offset().left,
    offsetTp = hgt.offset().top;
    var upX=event.clientX;
    var upY=event.clientY;
    $(this).css({boxShadow : ''+(-offsetLft+upX-blurStartW+scrollLeftPos)+'px '+(-offsetTp+upY-blurStartH+scrollTopPos)+'px 20px 100px white inset'});
});
/*********************************************/

/***reset box-shadow on mouseout***/
$('.blurPic').mouseout(function(){
    $(this).css({boxShadow : '0px 0px 0px 160px white inset'});
});
/**********************************/

html,body{
    margin:0px;
    padding:0px;
}
#container{
    position:relative;
    margin-left:100px;
    display:inline-block;
}
.revealPic{
    position:absolute;
    top:0px;
    left:0px;
    background-image:url('http://i.imgur.com/IGKVr8r.png');
    background-color:white;
    background-position:0px 0px;
    background-repeat:no-repeat;
    width:50px;
    height:50px;
    /*making div circular*/
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    -ms-border-radius:50%;
    -khtml-border-radius: 50%;
}

CSS

.pic{
    display:inline-block;
}
/*below CSS for the blurring div*/
#blurr{
    position:absolute;
    display:none;
    width:30px;
    height:30px;
    background-color:rgb(240,240,240);
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    box-shadow:0px 0px 10px 10px white;
    -moz-box-shadow:0px 0px 10px 10px white;
    -webkit-box-shadow:0px 0px 10px 10px white;
    opacity:0.8;
    filter:alpha(opacity=80); /* For IE8 and earlier */
}

html,body{
    margin:0px;
    padding:0px;
}
#container{
    position:relative;
}
.blurPic{
    position:absolute;
    top:0px;
    left:0px;
    width:0px;
    height:0px;
    box-shadow:0px 0px 0px 160px white inset; 
    -moz-box-shadow:0px 0px 0px 160px white inset; 
    -webkit-box-shadow:0px 0px 0px 160px white inset; 
    -ms-box-shadow:0px 0px 0px 160px white inset; 
    opacity:0.9;
    filter:alpha(opacity=0.9); /* For IE8 and earlier */
}

<div id="container">
    <img src="http://i.imgur.com/IGKVr8r.png" alt="follow picture" />
    <div class="revealPic"></div>
</div>

---

更新日期：2014年2月28日 HTML

<div id="container">
    <div class="blurPic"></div>
    <img src="http://i.imgur.com/IGKVr8r.png" alt="follow picture" />
</div>

jQuery

$('.pic').mousemove(function(event){
    event.preventDefault();
    var upX=event.clientX;
    var upY=event.clientY;
    $('#blurr').css({'display':'block','top':''+(upY-15)+'px','left':''+(upX-15)+'px'});
});

/**Give equal width and height as <img> to .blurPic**/
var hgt = $('.blurPic').width($('#container img').width());
$('.blurPic').height($('#container img').height());
/*****************************************************/

/*******Get shadow values*****/
var result = $('.blurPic').css('boxShadow').match(/(-?\d+px)|(rgb\(.+\))/g)
var color = result[0],
    y = result[1],
    x = result[2],
    blur = result[3];
/******************************/

/**Change box-shadow on mousemove over image**/
var blurStartW = hgt.width()/2;
var blurStartH = hgt.height()/2;
$('.blurPic').mousemove(function(event){
    event.preventDefault();
    var scrollLeftPos = $(window).scrollLeft(),
    scrollTopPos = $(window).scrollTop(),
    offsetLft = hgt.offset().left,
    offsetTp = hgt.offset().top;
    var upX=event.clientX;
    var upY=event.clientY;
    $(this).css({boxShadow : ''+(-offsetLft+upX-blurStartW+scrollLeftPos)+'px '+(-offsetTp+upY-blurStartH+scrollTopPos)+'px 20px 100px white inset'});
});
/*********************************************/

/***reset box-shadow on mouseout***/
$('.blurPic').mouseout(function(){
    $(this).css({boxShadow : '0px 0px 0px 160px white inset'});
});
/**********************************/

html,body{
    margin:0px;
    padding:0px;
}
#container{
    position:relative;
    margin-left:100px;
    display:inline-block;
}
.revealPic{
    position:absolute;
    top:0px;
    left:0px;
    background-image:url('http://i.imgur.com/IGKVr8r.png');
    background-color:white;
    background-position:0px 0px;
    background-repeat:no-repeat;
    width:50px;
    height:50px;
    /*making div circular*/
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    -ms-border-radius:50%;
    -khtml-border-radius: 50%;
}

jQuery

$('.pic').mousemove(function(event){
    event.preventDefault();
    var upX=event.clientX;
    var upY=event.clientY;
    $('#blurr').css({'display':'block','top':''+(upY-15)+'px','left':''+(upX-15)+'px'});
});

/**Give equal width and height as <img> to .blurPic**/
var hgt = $('.blurPic').width($('#container img').width());
$('.blurPic').height($('#container img').height());
/*****************************************************/

/*******Get shadow values*****/
var result = $('.blurPic').css('boxShadow').match(/(-?\d+px)|(rgb\(.+\))/g)
var color = result[0],
    y = result[1],
    x = result[2],
    blur = result[3];
/******************************/

/**Change box-shadow on mousemove over image**/
var blurStartW = hgt.width()/2;
var blurStartH = hgt.height()/2;
$('.blurPic').mousemove(function(event){
    event.preventDefault();
    var scrollLeftPos = $(window).scrollLeft(),
    scrollTopPos = $(window).scrollTop(),
    offsetLft = hgt.offset().left,
    offsetTp = hgt.offset().top;
    var upX=event.clientX;
    var upY=event.clientY;
    $(this).css({boxShadow : ''+(-offsetLft+upX-blurStartW+scrollLeftPos)+'px '+(-offsetTp+upY-blurStartH+scrollTopPos)+'px 20px 100px white inset'});
});
/*********************************************/

/***reset box-shadow on mouseout***/
$('.blurPic').mouseout(function(){
    $(this).css({boxShadow : '0px 0px 0px 160px white inset'});
});
/**********************************/

html,body{
    margin:0px;
    padding:0px;
}
#container{
    position:relative;
    margin-left:100px;
    display:inline-block;
}
.revealPic{
    position:absolute;
    top:0px;
    left:0px;
    background-image:url('http://i.imgur.com/IGKVr8r.png');
    background-color:white;
    background-position:0px 0px;
    background-repeat:no-repeat;
    width:50px;
    height:50px;
    /*making div circular*/
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    -ms-border-radius:50%;
    -khtml-border-radius: 50%;
}

---

我想我在几天前看到了类似的东西，但当时正在使用SVG。如果您对使用SVG很满意，我将尝试看看我是否能挖掘出这一点。您将找到SVG和JQUERI的答案。我不知道SVG。我将搜索和学习。如果你能试试，那就太好了。但是从jquery不可能吗。\n我的解决方案是使用JavaScript。您可以创建一个元素“放大镜”具有相同的背景图像，但使其裁剪图像的一部分。保持你目前的背景。当鼠标在背景图像上移动时，“放大镜”元素也跟着鼠标指针移动，并修改背景位置以在背景图像的相应位置显示图像。